Anti-Atlas and Ougarta Variscan belts connect obliquely in the Tafilalt-Maider area.
Fold interferences there occur in a thick-skinned tectonic regime.
Fold trend is controlled both by basement faults and superposed stress events.
Paleofault inversion and stress rotation account for a croissant-shaped anticline.
Opening of barite veins postdates the Variscan folding.